21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold Large Projects Present & Future

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 2 Overview Excuses What is large anyway? What is large in Oxford today? A large present project: ATLAS What may be large in Oxford tomorrow? Some large future possibilities: Linear Colliders

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 3 England1 23 rd min. Owen Brazil2 45 th min. Rivaldo 50 th min. Ronaldinho England2 23 rd min. Owen 89 th min. Wilkinson Brazil1 45 th min. Rivaldo

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 4 Excuses Don’t talk about all the past, I am too young to do that. Don’t talk about all the other projects (DELPHI, ZEUS, LHCb, CDF, SNO, MINOS, ADLER, VERITAS, HARP, SLD, LCFI, CRESST, ANTARES, Soudan2, Neutrino Factory, GRID) there are too many of them. Don’t talk about all the science, that would take too long. Don’t talk about all the people, you can talk to them directly (they are all here!) Don’t talk about all the problems, we never do that! But do talk about something (said Susan) I will talk about some large projects from this laboratory because large is one of the things that we do best.

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 5 What is large anyway (LHC)

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 6 M(  0 2 ) - M(  0 1 ) SUSY cascade signal t t background What is large anyway The physics potential: Beyond the SM Higgs (also in SM) SUSY Compositeness large extra dimensions anything up to O(few TeV) In the SM B-Physics Top Multi Gauge Boson Interactions

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 7 What is large anyway (ATLAS) large African elephant ATLAS (7000 tons) Size and Weight

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 8 What is large anyway The Collaboration 2400 users 165 institutes 34 countries The hole The Timescale even I have been working on it for 11 years and we will still be going strong in 15 years from now

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 9 past } } present, short term } present, long term What is large in Oxford today ATLAS-Oxford task list Bertie Botts every (16) flavour “dog-leg” cable (4 layer Cu/kapton flex circuits) L-2 Trigger Detector Layout Read-out chip design Mechanical Design Optical data transmission & control Services ‘harness’ Alignment Assembly Software vibrational ESPI, resolution 1/3  m 1.6m Encodes 40 Mbits/s control data onto 40 MHz bunch crossing clock  TTC signal to SCT modules. 3mm

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 10 What is large in Oxford today SCT – Alignment/Survey Alignment Strategy Excellent initial measurements Continuous monitoring of primary support structures Tracks X-ray Survey Energetic enough to penetrate four layers FSI – Frequency Scan Interferometry Over constrained grids of D length measurements

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 11 ATLAS – FSI grid designs 1  m per line gives<5  m in r  total

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 12 ATLAS – FSI on-detector Retro-reflectors are punched in small Al pellets, gold coated, tested using WIPM Quills are precision injection moulded parts

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 13 FSI Results 7 th digit changes L  =4*10 8 nm  =117nm  = 117 L=0.4m  L/L = 0.29 ppm

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 14 ATLAS – X-ray σ(rφ)< 6μm (clocking) σ(r) < 30μm (radius) σ(z) < 50μm (length)

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 15 ATLAS -Assembly Attach 1500 Modules to 3 cylinders (£ 10k each) Debug (first time all components come together) Test Ship Installation slot for planar insertion Barrel mm 0.55mm

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 16 ATLAS - Assembly Problems: Clearances < 1mm Grease layer 100 ± 10  m Insertion accuracy < 100  m Everything is VERY delicate (open wire bonds!) Infra structure: 10kW evaporative cooling system 700 cables, 2100 optical data links 9 computer systems Design and fabrication of assembly equipment Test equipment, TI, WIPM, ToF, FSI Design/manufacture shipping equipment

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 17 ATLAS – Assembly Facilities (ex. Heavy Lab on Level-3) Cooling/UPS/Services Cold Room (ground floor) Control Room (1 st floor) Clean Room (reception) 200 m 2 area on ground floor X-ray

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 18 ATLAS – Assembly Facilities

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 19 What may be large in Oxford tomorrow? Why a Linear Collider? Physics potential Understand EW symmetry breaking mechanism Do Higgs couplings generate masses? Higgs self-coupling Physics beyond the SM (SUSY) Collider even more challenging than detectors New initiatives on collider can use Oxford technology

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 20 Why a LC ? M H = 120 GeV, pb -1 S/  B=3.6 ( pb -1 ) “Complementarity !”

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 21 Tesla LCs are large (i.e. Tesla)

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 22 Large = 30km long Beam energy O(500GeV) Beams start at O(0.1  m) beams end up O(1nm) at interaction point no recirculation, you just have one shot to collide a given bunch

23 Interaction Region (FONT) Machine Interface = Interaction Region FONT = Feedback On Nanosecond Timescales Ground motion moves final doublet and beams stop colliding Beam-beam interaction kicks beams BPM measures kick of first few bunches in train Kicker steers remaining ones back into collision Need very fast feedback system SLAC since June x-band “button” BPM reclaimed SLC kicker P. Burrows, G. White, S. Jolly, G. Nesom

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 24 LC alignment is important (build accuracy: 200  m vertical over 600m for 30km total) This is the main beam line

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 25 Collider & BDS (LiCAS) Collider Alignment LiCAS = Linear Collider Alignment & Survey collider alignment at build time 200  m over 600m Today’s open air survey technology fails Build survey instrument that matches requirement Use FSI (ATLAS) & Straightness monitors (ZEUS and ATLAS) Extend technologies to new conditions

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 26 LiCAS Phase I Automatic survey train measures reference markers Later measure collider against reference Internal lines in vacuum Use scalable laser technology (not large monolithic lasers) DESY during FEL installation Same scheme for TESLA & NLC FSI-distance measurements straightness monitors straightness monitor beam reference markers tunnel wall single car with sensors

21 June 2002 Naming of the Denys Wilkinson Building Dr. Armin Reichold 27 Detector (LCFI) 0 0.5m ask her